CurreUnfortunately, we cannot migrate customer passwords to BigCommerce because passwords are encrypted and stored differently across eCommerce platforms.
We can still migrate supported customer information, such as names, email addresses, phone numbers, and billing or shipping addresses. After the migration, customers will need to create a new password using the Forgot Password option on your BigCommerce storefront. We recommend informing them about this change before launching the new store.
In case you have any other questions, please email us at [email protected].